Drill Bit Decimal Size Equivalents
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About Drill Bits
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Chip-Clearing Drill Bits for Wood
Tapered Square/Round Shank
An open spiral-flute design clears chips quickly, so these bits can bore smooth, deep holes through construction lumber, railroad ties, and utility poles. Also known as pole or ship auger bits.
Tapered square/round-shank drill bits have a tapered square shank that can be cut off to expose a round shank.
For technical drawings and 3-D models, click on a part number.
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Shank Size | Point Style | Each | |
Inch—Tapered Square/Round Shank | |||||||
|---|---|---|---|---|---|---|---|
Uncoated Steel | |||||||
| 3/8" | 0.375" | 18" | 12" | 3/8" | Screw | 0000000 | 000000 |
| 1/2" | 0.5" | 18" | 12" | 3/8" | Screw | 0000000 | 00000 |
| 9/16" | 0.5625" | 18" | 12" | 3/8" | Screw | 0000000 | 00000 |
| 5/8" | 0.625" | 18" | 12" | 3/8" | Screw | 0000000 | 00000 |
| 3/4" | 0.75" | 18" | 12" | 5/16" | Screw | 0000000 | 00000 |
| 7/8" | 0.875" | 18" | 12" | 5/16" | Screw | 0000000 | 00000 |
| 1" | 1" | 18" | 12" | 5/16" | Screw | 0000000 | 00000 |